From patchwork Tue Oct 2 06:33:02 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 188394 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 74CAA2C0098 for ; Tue, 2 Oct 2012 16:33:22 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754059Ab2JBGdV (ORCPT ); Tue, 2 Oct 2012 02:33:21 -0400 Received: from rcsinet15.oracle.com ([148.87.113.117]:21993 "EHLO rcsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753406Ab2JBGdK (ORCPT ); Tue, 2 Oct 2012 02:33:10 -0400 Received: from acsinet22.oracle.com (acsinet22.oracle.com [141.146.126.238]) by rcsinet15.oracle.com (Sentrion-MTA-4.2.2/Sentrion-MTA-4.2.2) with ESMTP id q926X5Rb014621 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 2 Oct 2012 06:33:06 GMT Received: from acsmt357.oracle.com (acsmt357.oracle.com [141.146.40.157]) by acsinet22.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id q926X5CA014388 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 2 Oct 2012 06:33:05 GMT Received: from abhmt111.oracle.com (abhmt111.oracle.com [141.146.116.63]) by acsmt357.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id q926X53G010996; Tue, 2 Oct 2012 01:33:05 -0500 Received: from linux-siqj.site (/75.36.244.44) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 01 Oct 2012 23:33:04 -0700 From: Yinghai Lu To: Bjorn Helgaas Cc: linux-pci@vger.kernel.org, Yinghai Lu Subject: [PATCH 04/10] PCI: Use device_add for device and bus early Date: Mon, 1 Oct 2012 23:33:02 -0700 Message-Id: <1349159588-15029-5-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1349159588-15029-1-git-send-email-yinghai@kernel.org> References: <1349159588-15029-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsinet22.oracle.com [141.146.126.238] Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Move out device registering out of pci_bus_add_devices, so we could put new created pci devices in device tree early. new pci_bus_add_devices will do the device_attach work to load pci drivers instead. Signed-off-by: Yinghai Lu --- drivers/pci/bus.c | 34 ++-------------------------------- drivers/pci/iov.c | 7 ------- drivers/pci/probe.c | 25 ++++++++++++++++++------- 3 files changed, 20 insertions(+), 46 deletions(-) diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 3144262..5b98505 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -179,12 +179,7 @@ static void pci_bus_attach_device(struct pci_dev *dev) */ int pci_bus_add_device(struct pci_dev *dev) { - int retval; - pci_fixup_device(pci_fixup_final, dev); - retval = device_add(&dev->dev); - if (retval) - return retval; pci_bus_attach_device(dev); dev->is_added = 1; @@ -201,21 +196,12 @@ int pci_bus_add_device(struct pci_dev *dev) */ int pci_bus_add_child(struct pci_bus *bus) { - int retval; - - if (bus->bridge) - bus->dev.parent = bus->bridge; - - retval = device_add(&bus->dev); - if (retval) - return retval; - bus->is_added = 1; /* Create legacy_io and legacy_mem files for this bus */ pci_create_legacy_files(bus); - return retval; + return 0; } /** @@ -241,36 +227,20 @@ void pci_bus_add_devices(const struct pci_bus *bus) if (dev->is_added) continue; retval = pci_bus_add_device(dev); - if (retval) - dev_err(&dev->dev, "Error adding device, continuing\n"); } list_for_each_entry(dev, &bus->devices, bus_list) { BUG_ON(!dev->is_added); child = dev->subordinate; - /* - * If there is an unattached subordinate bus, attach - * it and then scan for unattached PCI devices. - */ + if (!child) continue; - if (list_empty(&child->node)) { - down_write(&pci_bus_sem); - list_add_tail(&child->node, &dev->bus->children); - up_write(&pci_bus_sem); - } pci_bus_add_devices(child); - /* - * register the bus with sysfs as the parent is now - * properly registered. - */ if (child->is_added) continue; retval = pci_bus_add_child(child); - if (retval) - dev_err(&dev->dev, "Error adding bus, continuing\n"); } } diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index aeccc91..f286583 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -48,12 +48,7 @@ static struct pci_bus *virtfn_add_bus(struct pci_bus *bus, int busnr) return NULL; pci_bus_insert_busn_res(child, busnr, busnr); - child->dev.parent = bus->bridge; rc = pci_bus_add_child(child); - if (rc) { - pci_remove_bus(child); - return NULL; - } return child; } @@ -123,8 +118,6 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset) virtfn->is_virtfn = 1; rc = pci_bus_add_device(virtfn); - if (rc) - goto failed1; sprintf(buf, "virtfn%u", id); rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf); if (rc) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index c3da8f5..c1b7292 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -616,6 +616,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, { struct pci_bus *child; int i; + int ret; /* * Allocate a new bus, and inherit stuff from the parent.. @@ -630,8 +631,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, child->bus_flags = parent->bus_flags; /* initialize some portions of the bus device, but don't register it - * now as the parent is not properly set up yet. This device will get - * registered later in pci_bus_add_devices() + * now as the parent is not properly set up yet. */ child->dev.class = &pcibus_class; dev_set_name(&child->dev, "%04x:%02x", pci_domain_nr(child), busnr); @@ -645,11 +645,14 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, child->primary = parent->busn_res.start; child->busn_res.end = 0xff; - if (!bridge) - return child; + if (!bridge) { + child->dev.parent = parent->bridge; + goto add_dev; + } child->self = bridge; child->bridge = get_device(&bridge->dev); + child->dev.parent = child->bridge; pci_set_bus_of_node(child); pci_set_bus_speed(child); @@ -660,6 +663,10 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, } bridge->subordinate = child; +add_dev: + ret = device_add(&child->dev); + WARN_ON(ret < 0); + return child; } @@ -1290,6 +1297,8 @@ static void pci_init_capabilities(struct pci_dev *dev) void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) { + int ret; + device_initialize(&dev->dev); dev->dev.release = pci_release_dev; @@ -1320,6 +1329,10 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) down_write(&pci_bus_sem); list_add_tail(&dev->bus_list, &bus->devices); up_write(&pci_bus_sem); + + /* notifier could use pci capabilities */ + ret = device_add(&dev->dev); + WARN_ON(ret < 0); } struct pci_dev *__ref pci_scan_single_device(struct pci_bus *bus, int devfn) @@ -1638,13 +1651,13 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, char bus_addr[64]; char *fmt; - b = pci_alloc_bus(); if (!b) return NULL; b->sysdata = sysdata; b->ops = ops; + b->number = b->busn_res.start = bus; b2 = pci_find_bus(pci_domain_nr(b), bus); if (b2) { /* If we already got to this bus through a different bridge, ignore it */ @@ -1681,8 +1694,6 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, /* Create legacy_io and legacy_mem files for this bus */ pci_create_legacy_files(b); - b->number = b->busn_res.start = bus; - if (parent) dev_info(parent, "PCI host bridge to bus %s\n", dev_name(&b->dev)); else